fix gbuffer resizing

src/graphics/core/GBuffer.hpp

@@ -29,13 +29,13 @@ private:
     uint height;
 
     uint fbo;
-    uint colorBuffer;
-    uint positionsBuffer;
-    uint normalsBuffer;
-    uint emissionBuffer;
-    uint depthBuffer;
-    uint ssaoFbo;
-    uint ssaoBuffer;
+    uint colorBuffer = 0;
+    uint positionsBuffer = 0;
+    uint normalsBuffer = 0;
+    uint emissionBuffer = 0;
+    uint depthBuffer = 0;
+    uint ssaoFbo = 0;
+    uint ssaoBuffer = 0;
 
     void createColorBuffer();
     void createPositionsBuffer();